[Pytest-commit] Issue #609: Problem with "plugin already registered" on Raspbian (hpk42/pytest)

[Charlie Clark]

New issue 609: Problem with "plugin already registered" on Raspbian
https://bitbucket.org/hpk42/pytest/issue/609/problem-with-plugin-already-registered-on

Charlie Clark:

Hi,

I get a weird failure when I run py.test on my project on a RaspberryPi without explicitly passing in the [project](https://bitbucket.org/openpyxl/openpyxl) so

`py.test` fails
`py.test openpyxl` runs fine

I've manually updated pip, setuptools and virtualenv on the box but that doesn't seem to make much difference. But I suspect it's probably something to do with the Python .deb package.

I can't reproduce the behaviour on a different Debian system.

```
#!python

(openpyxl)openpyxl at Flay ~/openpyxl $ py.test -xrf
============================================================ test session starts =============================================================
platform linux2 -- Python 2.7.3 -- py-1.4.25 -- pytest-2.6.3
collected 0 items / 1 errors

=================================================================== ERRORS ===================================================================
_____________________________________________________________ ERROR collecting . _____________________________________________________________
local/lib/python2.7/site-packages/py/_path/common.py:331: in visit
    for x in Visitor(fil, rec, ignore, bf, sort).gen(self):
local/lib/python2.7/site-packages/py/_path/common.py:377: in gen
    for p in self.gen(subdir):
local/lib/python2.7/site-packages/py/_path/common.py:367: in gen
    if p.check(dir=1) and (rec is None or rec(p))])
local/lib/python2.7/site-packages/_pytest/main.py:628: in _recurse
    ihook.pytest_collect_directory(path=path, parent=self)
local/lib/python2.7/site-packages/_pytest/main.py:166: in call_matching_hooks
    plugins = self.config._getmatchingplugins(self.fspath)
local/lib/python2.7/site-packages/_pytest/config.py:688: in _getmatchingplugins
    plugins += self._conftest.getconftestmodules(fspath)
local/lib/python2.7/site-packages/_pytest/config.py:521: in getconftestmodules
    mod = self.importconftest(conftestpath)
local/lib/python2.7/site-packages/_pytest/config.py:554: in importconftest
    self._onimport(mod)
local/lib/python2.7/site-packages/_pytest/config.py:674: in _onimportconftest
    self.pluginmanager.consider_conftest(conftestmodule)
local/lib/python2.7/site-packages/_pytest/core.py:201: in consider_conftest
    if self.register(conftestmodule, name=conftestmodule.__file__):
local/lib/python2.7/site-packages/_pytest/core.py:95: in register
    name, plugin, self._name2plugin))
E   ValueError: Plugin already registered: /home/openpyxl/openpyxl/openpyxl/conftest.pyc=<module 'openpyxl.conftest' from '/home/openpyxl/openpyxl/openpyxl/conftest.pyc'>
E   {'helpconfig': <module '_pytest.helpconfig' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/helpconfig.pyc'>, 'pytestconfig': <_pytest.config.Config object at 0xb683e610>, 'runner': <module '_pytest.runner' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/runner.pyc'>, 'unittest': <module '_pytest.unittest' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/unittest.pyc'>, 'pastebin': <module '_pytest.pastebin' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/pastebin.pyc'>, 'skipping': <module '_pytest.skipping' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/skipping.pyc'>, 'genscript': <module '_pytest.genscript' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/genscript.pyc'>, 'session': <Session 'openpyxl'>, 'tmpdir': <module '_pytest.tmpdir' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/tmpdir.pyc'>, 'cap
 ture': <module '_pytest.capture' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/capture.pyc'>, 'terminalreporter': <_pytest.terminal.TerminalReporter instance at 0x96c738>, 'assertion': <module '_pytest.assertion' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/assertion/__init__.pyc'>, 'mark': <module '_pytest.mark' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/mark.pyc'>, 'terminal': <module '_pytest.terminal' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/terminal.pyc'>, 'main': <module '_pytest.main' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/main.pyc'>, 'nose': <module '_pytest.nose' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/nose.pyc'>, 'python': <module '_pytest.python' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/python.pyc'>, 'recwarn': <module '_pytest.recwarn' from '/home/openpyxl/o
 penpyxl/local/lib/python2.7/site-packages/_pytest/recwarn.pyc'>, 'funcmanage': <_pytest.python.FixtureManager instance at 0x977878>, 'monkeypatch': <module '_pytest.monkeypatch' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/monkeypatch.pyc'>, 'resultlog': <module '_pytest.resultlog' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/resultlog.pyc'>, '3062060720': <_pytest.config.PytestPluginManager object at 0xb68356b0>, 'capturemanager': <_pytest.capture.CaptureManager instance at 0x864f08>, 'junitxml': <module '_pytest.junitxml' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/junitxml.pyc'>, 'doctest': <module '_pytest.doctest' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/doctest.pyc'>, 'pdb': <module '_pytest.pdb' from '/home/openpyxl/openpyxl/local/lib/python2.7/site-packages/_pytest/pdb.pyc'>, '/home/openpyxl/openpyxl/openpyxl/conftest.pyc': <module 'openpyxl.conftest' from
  '/home/openpyxl/openpyxl/openpyxl/conftest.pyc'>}
========================================================== 1 error in 22.09 seconds ==========================================================
```